Steam-engine



2 Sheets-Sheet 1.- B. O. WAITE.

STEAM ENGINE.

(No Model.)

Patented July 28, 1885.

ATTORNEYS.

2 Sheets-Sheet 2. B. O. WAITE.

(No Model.)

STEAM ENGINE.

Patented July 28, 1885..

INVENTOR WITNESSES ATTORNEYS.

N, PETERS Phntolilhogrzphur, Walflnglull. D. C.

NITED STATES PATENT OFFICE.

BENJAMIN G. \VAITE, OF BROOKLYN, NEWV YORK.

STEAM-ENGINE.

SPECIFICATION forming part of Letters Patent No. 322,999, dated July 28,1885.

Application filed June 23, 1884. (No model.) I

' To aZZ whom it may concern.-

ject to obtain simplicity and durability of construction and economical operation of that type of engine whether the power in use is the full or only the partial capacity of the en gine, all as hereinafter described and claimed.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a sectional plan view of an engine of the improved construction. Fig. 2 is a side elevation of the same. Fig. 3 is a longitudinal section of the cylinder in a plane at right angles to Fig. 1. Fig. 4 is a side view of the cylinder in reverse of Fig. 2 and with the steam-chest cover removed. Fig. 5 is an end view of the cylinder with the head removed and steanrchest in section. Figs. 6, 7, and 8 are detail views. Fig. 9 is a side eleva tion of the ordinary link-motion.

The engine shown is horizontal. A is the bed-plate B, the cylinder; 0, the steam-chest at one side of the cylinder; and D, the shaft, provided with three cranks, f f 9, two being at one side, and the third crank, g, diametrically opposite and between the other two.

The piston-rod a, carrying one head, I), is tubular, and is attached rigidly to a cross head, 0, that is fitted to move on slideways d. From the cross-head c rods 6 0 pass to the cranks f f. The piston-rod h, connected to head 2', passes through the rod a and crosshead 0, and is connected to a cross-head, k, on slideways l, and a rod, m, connects head is with crank g. The cross-head c is provided with a stuffing-box, d, around rod h.

The cylinder is formed with steam-passages n n from its ends, uniting at a common open ing in the valveseat. There is also a steampassage, 0, from the mid-length of the cylinder-opening to a separate part in the valveseat, and between these two steam-ports there is an exhaust-port in the seat connecting to the exhaust-pipe p. The valve p is of D form, and has a transverse movement in relation to the cylinder for connecting either steam-passage with the exhaust.

For operating the valve and reversing the movement the following mechanism is employed: q is a rock-shaft fitted transversely of the bed-plate and beneath the cylinder. On one end of this shaft is an arm, q, (see Fig. 4,) having a crank-pin, Q2, that takes the slot of a T-piece,r,on the valve-rod s, the piece 1' being adjustable for setting the valve. On the other end of shaft (1 is a dlsk, 9*, provided with crank-pins r at opposite sides. ttare rods connected together, having hooked ends for engaging pins r t is a nut and hand-wheel on shaft q. s is a lever that connects by a link, 8*, with one rod 16, and the longer arm of the lever has a bolt at t entering a slot in a fixed segment, u, so that the lever can be secured by a nut on the bolt '6 The lever s, as shown in Fig. 8, lies between the hand-wheel t and hub of disk r, so as to be clamped by the hand-wheel when the rod tengages the upper pin 2- When the engine is reversed and rod engages the lower pin, the lever is to be locked to the segment a. The rods it may be operated by an ordinary eccentric on theshaft; but lprefe'r the device shown.

On the engineshaft D is a straight-grooved disk, 1), (shown most clearly in Fig. 7,) having lengthwise of the groove a screw, o, carrying a nut, '0 that is formed with a crank-pin receiving the head-piece w, to which the two rods t are connected. The piece to has a slot receiving a collar 011 the crank-pin,and on the pins are washers 10', at opposite sides of piece 20, while a nut, 10, on the end of the pin clamps the inner collar to the disk 22, thereby holding the parts firmly together. This construction allows adjustment to regulate the length of movements of the valve, and by shifting the rods tso as to release one and engage the other with disk 1" the movement of the valve is reversed.

As shown most clearly in Fig. 6, the rod 8 is connected to valve 1) by means of flanged collars a engaging lugs b on the valve. The collars a are held on the rod by nuts 0, which allow their adjustment; and in case of wear the outer collar can be taken off, filed down, to bring the flanges nearer together, and then replaced and screwed up to the lugs.

In the operation of the engine steam entering between the two piston-heads by the passage 0 forces them apart and to the opposite ends of the cylinder, and they are again forced to the middle position by the steam entering by passages n. Each piston thus has astroke half the length of the cylinder, and the momentum of their movement is balanced by their motion in reverse of each other. The strain is also balanced by the reverse cranks on the shaft, so that the engine runs without 20 jar or tendency to oscillate.

When the full capacity of the engine is not required, one cross-head may be made fast with the pistonhead at the center of the cylinder and the shaft driven by the movement of the other head alone, thereby obtaining full power from a small amount of steam.

The details of construction specified may be varied within the scope of my invention. In

.1. In a steam-engine, the combination of cylinder B, having steam-passages n 0, heads b i, piston-rods a h, stuffing-box d, and crossheads 0 is, substantially as shown and described.

2. The combination of valve 9, fitted for movement transversely' of the cylinder, with a cylinder formed with steam-passages n n o and intermediate exhaust-port, and the two pistons b 13, substantially as described.

BENJAMIN C. \VAITE. \Vitnesses:

GEO. D. WALKER, O. SEDGWIOK. 

